INVESTIGADORES
GARDENAL Cristina Noemi
artículos
Título:
Relatedness dynamics and sex-biased dispersal in a seasonal cycle of corn mice from intensively managed agroecosystems
Autor/es:
SOMMARO, LUCIA V; MARTÍNEZ, JUAN J; CHIAPPERO, MARINA B; STEINMANN, ANDREA R; GARDENAL, CRISTINA N; PRIOTTO, JOSÉ W
Revista:
Current Zoology
Editorial:
Oxford
Referencias:
Año: 2022
ISSN:
1674-5507
Resumen:
The sex-biased dispersal and kinship dynamics are important factors shaping the spatial distribution of individuals and are key parametersaffecting a variety of ecological and evolutionary processes. Here, we studied the spatial distribution of related individuals within a populationof corn mice Calomys musculinus in a seasonal cycle to infer dispersal patterns. The sampling was carried out from spring 2005 to winter 2006in field borders of intensively managed agroecosystems. Genotyping data from 346 individuals with 9 microsatellites showed spatial geneticstructure was weak for males, but not for females. The results indicate a complex spatial kinship dynamic of related females across all seasons.Which, contrary to our expectations, dispersal distances decrease with the increase of the population abundance. Meanwhile, male dispersaldistances were greater when population abundance increased and thus the availability of active females. Males disperse greater distances tomate and sire offspring with distant females as a possible inbreeding avoidance mechanism. This study shows that C. musculinus is capableof much greater scattering distances than previously reported and that dispersal occurs fluidly and without barriers across the agroecosystem.The indirect benefit of dispersal on individual fitness could be related to relaxing the competition in the natal area and increasing the matingrate. Our study highlights the value of combining genetic relatedness, fieldwork observations, and behavioral data to estimate dispersal at a finegeographical scale.